Resolve "remove Reaction.getCenterLine method"
Closes #30 (closed) @david.hoksza, this MR should also resolve the problem with reaction rectangles appearing in weird places. Give it a try and let me if it's working as expected.
Btw. I forgot to mention but minerva (master branch) requires tomcat8 - one of the dependencies (spring) might crash on tomcat7 or below.
Edited by Piotr Gawron